LED7706

Overview

The LED7706 is a monolithic LED driver IC designed for LCD panel backlighting, integrating a high-efficiency boost converter and six controlled current generators. It supports an input voltage range of 4.5 V to 36 V and delivers up to 36 V output. Each of the six rows provides a maximum sink current of 30 mA with ±2% matching accuracy. The device features adjustable switching frequencies between 250 kHz and 1 MHz, PWM dimming capability down to 1% duty cycle at 20 kHz, and comprehensive fault detection for open and shorted LEDs.

Feature Summary

• Integrates a high-efficiency monolithic boost converter with internal power MOSFET and +5 V LDO for device supply.
• Provides six independently controlled current generator rows with programmable sink currents up to 30 mA.
• Supports high-frequency direct PWM dimming with less than 500 ns minimum on-time and 1% duty cycle management.
• Includes robust protection mechanisms such as thermal shutdown, output over-voltage protection, and LED failure detection.

Applications

• LCD panel backlighting systems
• Industrial display applications
• Multi-device synchronized lighting arrays

Procurement Notes

Verify the specific package variant, typically 24-VFQFPN, against design requirements. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure compatibility with the intended switching frequency range and PWM control signals. Review application notes for proper layout of ceramic output capacitors and inductor selection to maintain stability.

Selection Notes

Select this component for designs requiring six-channel constant current drive with integrated boost regulation. It is suitable for applications needing precise current matching across rows and efficient power management. Consider the adjustable switching frequency for EMI optimization and the pulse-skip mode for improved light-load efficiency. Ensure the input voltage range aligns with the system power supply architecture.

Part Context

Manufactured by STMicroelectronics, the LED7706 belongs to the dedicated LED driver family for display backlights. It replaces discrete solutions by combining power conversion and current regulation into a single compact package. The device is part of a broader ecosystem including evaluation boards like STEVAL-ILL020V1 for rapid prototyping and performance validation.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.